Well, that didn't take long. Google fixed multiple problems with its services this week but less than a day later network administrators and users started seeing another rash of Gmail problems.
Google confessed, "We're aware of a problem with Gmail affecting a significant subset of users. The affected users are able to access Gmail but are seeing error messages, high latency, and/or other unexpected behavior. We will provide an update by 12/15/20, 5:30 PM [Eastern US]detailing when we expect to resolve the problem. Please note that this resolution time is an estimate and may change."
Downdtector reported a major spike at about 3 PM Eastern. 73% of the reported problems were with receiving messages. 23% of users reported having trouble logging into Gmail.
On the internet network administrator outages list, admins reported they were seeing random bounceback issues with an average of 10% bouncebacks on their test emails. Still, other administrators reported seeing bounces when sending from GSuite to consumer Gmail.
Typical bounceback error messages said "The email account that you tried to reach does not exist."
This problem showed up mostly in the US, but it also caused failures in Europe, Australia, and New Zealand.
At 6:51 PM Eastern, Google reported the Gmail problem had been resolved. The company also stated: "We apologize for the inconvenience and thank you for your patience and continued support. Please rest assured that system reliability is a top priority at Google, and we are making continuous improvements to make our systems better. If you are still experiencing an issue, please contact us via the Google Help Center."